PITTSBURGH GOES LIVE WITH DOWNTOWN TROPOS METRO-SCALE WI-FI MESH NETWORK

Residents, Workers and Visitors Get Free and Low Cost Wi-Fi Access Services and Wi-Fi Community Services based on Tropos Networks' Metro Mesh System

PITTSBURGH, PA, September 13, 2006 - Tropos Networks, the market leader for metro-scale, Wi-Fi mesh network systems, today announced that Pittsburgh has gone live with its Downtown Wi-Fi Network using the Tropos MetroMesh municipal Wi-Fi infrastructure, the most widely deployed Wi-Fi mesh technology in the world.

The initiative of the Pittsburgh Downtown Partnership (PDP) in conjunction with the city of Pittsburgh, the network is operated by US Wireless Online and today provides free and fee-based packages for outdoor access in the Central Business District/Golden Triangle, and the growing areas of North Shore and Lower Hill District.

"Our goal is to bring cutting-edge amenities to Downtown Pittsburgh to continue to enhance and enrich the experience of workers, residents and visitors to the area. Wi-Fi Downtown Pittsburgh creates a valuable community resource for connecting people while outdoors," said Michael M. Edwards, president and CEO of the PDP. "The attractive economics of the Tropos solution has allowed us, in partnership with US Wireless Online, to establish a network quickly and economically. Plus the Tropos technology gives us the flexibility and capability to deal with the environmental challenges presented by the hilly terrain of the area."

During the opening NFL game between the Pittsburgh Steelers and the Miami Dolphins last Thursday, the city held a promotional kick off for the downtown network signing up 500 users and trialing 45 users prior to this Wednesday's formal launch. Free access is provided at 512Kbps of bandwidth while fee based packages of $7.99 per day, $14.99 per month or $119.99 per year receive 1 Mbps.

"The response and the feedback to date have been overwhelmingly positive for this downtown Pittsburgh service. Working with Tropos Networks' state-of-the-art metro-scale Wi-Fi infrastructure, we were able to quickly and cost-effectively deploy the network over the downtown area and offer the free and low cost services to the community," said Timothy J. Pisula, executive vice president and CTO of US Wireless Online, one of the nation's largest wireless Internet broadband network operators, and provider of similar municipal Wi-Fi networks using Tropos MetroMesh systems in Baton Rouge and other cities.

In addition to the downtown, Wi-Fi Downtown Pittsburgh is also providing municipal benefits, including four secured mobile command units now up and running for the City of Pittsburgh public safety use. In the next couple of months, it will address digital divide issues by providing complimentary connections in partnership with Wireless Neighborhoods, an alliance of community and faith organizations committed to support children's education, promote economic development and address other social barriers.

"While our Tropos MetroMesh Wi-Fi systems are deployed in many major cities throughout the world, this Wi-Fi network covering downtown Pittsburgh is particularly gratifying for me," said Bert Williams, Pittsburgh native and acting vice president of marketing for Tropos Networks. "I'm proud to work for a company that is providing a real economic and social benefit to my hometown as well as other communities."

The Pittsburgh network uses more than 55 Tropos Networks' 5210 MetroMesh Wi-Fi routers on light poles throughout the downtown, enabling reliable wireless data connectivity between users and the Internet. Deployed in more than 300 customer sites worldwide, Tropos MetroMesh routers quickly and economically use the intelligent Tropos Predictive Wireless Routing Protocol (PWRPT) to provide pervasive coverage over metro areas. PWRP forms a wireless mesh, dynamically routing traffic along the highest throughput path to a wired gateway. This intelligent routing negates effects of radio frequency (RF) interference, wired backhaul failure and mesh router failure.

About Tropos
Tropos® Networks is the market leader in delivering metro-scale Wi-Fi mesh network systems. Our systems have been selected to unwire more major league cities than all competitors combined and are installed in 30 countries. The patented Tropos MetroMeshT architecture delivers the ultimate scalability, high capacity at low cost and great user experience demanded by carriers, municipalities and network users. Our unique expertise includes high-performance mesh software development, mesh RF engineering, metro-scale network planning, deployment and optimization, and navigating the municipal approval process. Tropos Networks is headquartered in Sunnyvale, California. For more information, please visit www.tropos.com, call 408-331-6800 or write to info@tropos.com.

Tropos is a registered trademark of Tropos Networks, Inc. Tropos Networks, MetroMesh, PWRP, AMCE and Metro-Scale Mesh Networking Defined are trademarks of Tropos Networks, Inc. All other brand or product names are trademarks or registered trademarks of their respective holder(s).